1925] Myrmecophilous Phoridce from the N eotropical Region 305 
As indicated this species differs from E. wheeleri by the much 
longer lateral thoracic bristle and wing bristles and in the form 
of the second abdominal tergite. 
In addition to the above I have another most remarkable 
species which is referred provisionally at least to Ecitomyia. It 
certainly cannot be placed in any other genus so far described 
and differs also very conspicuously from the other very closey 
allied species of this genus in possessing a number of enormously 
enlarged bristles on the abdomen. These form transverse rows 
at each side of the tergites which are formed as in Ecitomyia as 
are also the head, thorax and wings. As I suspect that inter- 
mediate forms may be discovered it does not seem wise to make 
this the type of a new monotvpic genus. 
Ecitomyia spinosa sp. nov. (Fig. 1) 
$. Length 1.5-1. 7 mm. Head, thorax and abdominal 
plates and spots yellowish brown; abdomen pale yellowish white; 
legs brownish yellow; antennae pale yellow; wings dark, almost 
black except at base. Head somewhat more than twice as broad 
as long, the anterior margin of the front rounded, more sharply 
so at the middle. Mouthparts very small, retracted within the 
oral cavity which is sharply carinate anteriorly. Eyes small, 
oval, about one-fourth as long as the head-height; ocelli entirely 
absent. Antennae ovate, quite distinctly contracted at the apex; 
arista long, strongly pubescent, as long as the head-height. Four 
strong proclinate antennal bristles medially at the anterior mar- 
gin of the front, the upper pair longer and set further apart; 
middle frontal row represented only by one lateral bristle near 
the eye; upper row of four about equally spaced. Thorax oval, 
twice as wide as long, with a strong bristle at each side and four 
across the disk; also a pair of smaller ones near the middle 
behind and another toward the side between the lateral pair of 
the transverse row. Wings reduced to small band-shaped pads 
as long as the dorsum of the thorax; the upper surface is convex, 
the tip more or less pointed and the surface strongly bristly, 
some of the bristles almost as long as the wing. Abdomen 
broadly ovate, the four apical segments forming a tube of rather 
